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Updating table causes high processor utlization How to chat online with girls on which website through mobile with out registration

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Hi, I just upgraded our Oracle DB 10.2.0.4 to 10.2.0.5, when we started the DB the CPU utilization jas increase to above 90%, this DB has no updated statistics for quite long time and when we tried to update it, it actually solved the issue.My question is does updating the statistics really did the trick?Few organizations resort to putting muscle power to scale up the system without analyzing the root cause of the performance problem.For example, a typical scenario might involve a SQL Server instance with memory that is running continuously slow; frequently, the DBA responds to this by recommending that the RAM on the server be increased.some known issues which can increase Kernel CPU time are We have seen high resolution timer in SQL 2008 or SQL 2005 SP3 caused high kernel time in Virtual Machines because of outdated BIOS .Temporarily disabling high resolution timer by turning on trace flag 8038 (configure as startup parameter) to prove this.If the statistics are not collected, then basically the DB is unable to choose the right index for every execution or none, hence putting extra load on the system for full table scan.

The example below is taken from Performance Dashboard reports query: DECLARE @ms_ticks_now BIGINT SELECT @ms_ticks_now = ms_ticks FROM sys.dm_os_sys_info; SELECT TOP 15 record_id ,dateadd(ms, - 1 * (@ms_ticks_now - [timestamp]), Get Date()) AS Event Time , SQLProcess Utilization , System Idle ,100 - System Idle - SQLProcess Utilization AS Other Process Utilization FROM ( SELECT record.value('(./Record/@id)[1]', 'int') AS record_id ,record.value('(./Record/Scheduler Monitor Event/System Health/System Idle)[1]', 'int') AS System Idle ,record.value('(./Record/Scheduler Monitor Event/System Health/Process Utilization)[1]', 'int') AS SQLProcess Utilization , TIMESTAMP FROM ( SELECT TIMESTAMP ,convert(XML, record) AS record FROM sys.dm_os_ring_buffers WHERE ring_buffer_type = N'RING_BUFFER_SCHEDULER_MONITOR' AND record LIKE '% The query above shows 15 minutes worth of data.

Whenever there is a high CPU issue reported on SQL Server machine, we should first determine whether the issue was caused by SQL Server or some process outside of SQL.

Essentially, it’s necessary to narrow down the high CPU problem to the lowest possible level–the component which is causing high CPU.

There could have been other things that could have also contributed to the CPU utilisation.

Oracle enhances CBO from version to version, and gathering correct and recent statistics for CBO will help in generating effective execution plans.